[OpenSER-Users] CANCEL with Route headers

[Klaus Darilion]

Andreas Granig schrieb:
> Hi all,
> 
> I've a Cisco PGW interconnecting with an OpenSER server. The INVITE is 
> sent to OpenSER, which does some record-routing via some different hops 
> and then sends back the 180 from the called party.
> If the calling party now cancels the call, the PGW tries to loose-route 
> the CANCEL by adding the Route header to the CANCEL and altering the 
> R-URI, which is rejected by my OpenSER since I don't allow initial 
> loose-routing.
> 
> So the question is: is it valid for a CANCEL to carry a Route header 
> which wasn't available in the INVITE? §9.1 of RFC3261 says it MUST 
> contain the Route header if it was present in the request being 
> cancelled. What about the other way around? I heavily suspect it's 
> violating the RFC since CANCEL should be more or less a 1:1 copy of the 
> INVITE, but can anyone confirm this?

I think it is a bug in the Cisco.

klaus

> If it violates the RFC, anyone with some Cisco knowledge who knows how 
> to disable this behavior, or is it a known bug?
> 
> Cheers,
> Andreas
> 
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